Fair.Rfk Jr would certainly have vetoed it, as you say he may have been over ridden. Trump was on board with operation warp speed from the jump and even now can’t stop talking about it and how great it was
But what was promised vs what was delivered were two different things. And the vaccine wasn't released until after Biden elected.
So there is again, some nuance to this. And Trump was never in favor of mandating a vaccine.
RFKs greatest appeal is on vaccines and his book on Fauci is superb.
Unfortunately, it looks like Dems are trying to sue him for Superpac coordination and to remove from ballots even as an independent.
Clearly they think he hurts Biden more than Trump.